Last updated: June 24, 2025
In December, the average temperature in Plymouth, United States, hovers around 0°C (33°F), with temperatures ranging from a brisk -23°C (-10°F) to a mild 17°C (63°F). Expect 54 mm (2.1 in) of precipitation over approximately 9 days, contributing to an average humidity of 86% that adds to the region's chill. Be prepared for a typical winter atmosphere!
In December in Plymouth, the average temperature is 0°C (33°F), with maximums reaching 17°C (63°F) and minimums dropping as low as -23°C (-10°F). This wide temperature range suggests that travelers should be prepared for both chilly conditions and milder weather during their visit.
In Plymouth in December, the precipitation amount is 54 mm (2.1 in) over a span of 9 days.
In Plymouth in December humidity is 86%. With an average temperature of 0°C (33°F), this humidity feels like a damp chill that permeates your clothes, making traveling uncomfortable and necessitating warm, layered clothing to stay dry and cozy.
In Plymouth in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Plymouth, you can visit Hourly UV Index in Plymouth.
UV Risk Categories
Weather in Plymouth varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Plymouth, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -3°C (27°F) | 64 mm (2.5 inches) | 88% | low |
| February Weather | -2°C (29°F) | 66 mm (2.6 inches) | 87% | moderate |
| March Weather | 3°C (38°F) | 73 mm (2.9 inches) | 85% | moderate |
| April Weather | 8°C (47°F) | 86 mm (3.4 inches) | 86% | very high |
| May Weather | 15°C (60°F) | 117 mm (4.6 inches) | 80% | very high |
| June Weather | 21°C (71°F) | 85 mm (3.3 inches) | 80% | very high |
| July Weather | 24°C (75°F) | 91 mm (3.6 inches) | 80% | very high |
| August Weather | 23°C (73°F) | 74 mm (2.9 inches) | 80% | very high |
| September Weather | 19°C (66°F) | 62 mm (2.4 inches) | 80% | high |
| October Weather | 12°C (55°F) | 98 mm (3.9 inches) | 84% | moderate |
| November Weather | 4°C (40°F) | 77 mm (3.0 inches) | 89% | moderate |
| December Weather | 0°C (33°F) | 54 mm (2.1 inches) | 86% | low |